<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS的基本语法</title>
    <!-- 连接CSS文件 外部样式表-->
    <link rel="stylesheet" href="css/style.css">
</head>
<body>
    <!-- <h1>This is <strong>very</strong> <strong>very</strong> important.</h1>
    <h1>This is <em>really <strong>very</strong></em> important.</h1> -->

    <ul class="food">
        <li>水果
            <ul>
                <li>香蕉</li>
                <li>苹果</li>
                <li>菠萝</li>
            </ul>
        </li>
        <li>蔬菜
            <ul>
                <li>白菜</li>
                <li>萝卜</li>
                <li>菠菜</li>
            </ul>
        </li>
    </ul>
</body>
</html>